In my experience, you do not need to purchase the full version to install it on a clean hard drive. I have upgraded several Windows OS's in the past and several times on a reformatted hard drive. The installation CD will ask you to verify your eligilibity for the upgrade and usually this is accomplished by inserting the previous version's CD into the drive for verification, then the installation proceeds. For example, I upgraded 95 to 98 to 98SE to ME, all with upgrade versions because they were eligible. But check the box on XP, they specify which are eligible for upgrade.
On a different note, I have had nothing but trouble with all of the versions mentioned above and am looking forward to installing XP. I've heard nothing but good things regarding reliability since the base code (kernel?) is based on 2K which is based on NT.
And, a clean install on a reformatted hard drive has to be the best way to go followed by installation of all applications.
On a different note, I have had nothing but trouble with all of the versions mentioned above and am looking forward to installing XP. I've heard nothing but good things regarding reliability since the base code (kernel?) is based on 2K which is based on NT.
And, a clean install on a reformatted hard drive has to be the best way to go followed by installation of all applications.

